from arm9tdmi.c:38
enum arm9tdmi_vector_bit
{
ARM9TDMI_RESET_VECTOR = 0x01,
ARM9TDMI_UNDEF_VECTOR = 0x02,
ARM9TDMI_SWI_VECTOR = 0x04,
ARM9TDMI_PABT_VECTOR = 0x08,
ARM9TDMI_DABT_VECTOR = 0x10,
ARM9TDMI_IRQ_VECTOR = 0x40,
ARM9TDMI_FIQ_VECTOR = 0x80,
};